Home / 398,123,178.34-549,645,661.36-353,948,162.40

Finding the Fourth Proportional to 398,123,178.34, 549,645,661.36 and 353,948,162.40

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Solution

The fourth proportional to 398,123,178.34, 549,645,661.36 and 353,948,162.40 is: 488,657,989.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,123,178.34 : 549,645,661.36 = 353,948,162.40 : x
  2. Step 2: Convert to fraction form
    398,123,178.34/549,645,661.36 = 353,948,162.40/x
  3. Step 3: Cross multiply
    398,123,178.34x = 549,645,661.36 × 353,948,162.40
  4. Step 4: Simplify right side
    398,123,178.34x = 194,546,071,807,961,472
  5. Step 5: Solve for x
    x = 194,546,071,807,961,472/398,123,178.34
  6. Step 6: Final answer
    x = 488,657,989.26

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.